Diamond-cutter&#39;s dop.



L. LANG.

DIAMOND CUTTERS DOP.

APPLICATION FILED ocT.8, 1914.

l 147,5 1 '7. Patented July 20, 1915.

UNITED sa'rEs PATENT 'Louis LANG, or NEwYoraK, N. Y.

"DIAMOND-correas nor.y

To all/whom it may concern.'

Be it known that I, LOUIS LANG, a citizen of the UnitedStates, and aresident of the city of New York, borough of Manhattan, in the countyand State of `New York, have invented a new and ImprovedDiamond- CuttersDop, of which the following isla full, clear, and exact description.

This invention relates to a dop to be used by diamond cutters inthecutting and polishingl of diamonds, and it has for its general object toovercome the disadvantages in the dops now commonlyv employed.

More specifically the invention has for its object to provide a novel,simple and effective means for firmly clamping the stone in the dop insuch a manner that the table and two facets can be ground withoutrequiring the stone to be unclamped and repositioned.

A further object of the inventlon 1s the provision of a novel form ofuniversal joint between the body of the dop and its supy claims appendedhereto.

In Athe accompanyingl drawing, which illustrates/one embodimentof theinvention and'wherein similar characters of reference indicatecorresponding Vparts in all the view's, Figure 1 'is a side viewk of thedop,

.showing the body in full lines in such relation to ,they stem as to cutthe tableof `a diamond and showing by dottedlines the ltwo oppositeangularI positions for cutting two diametrically `opposite facets; Fig.2 is l .anenlarged sectional view on the line 2 2,

Fig. 1; Fig.'3 isa view of the uppersecf tion of the dop removed, theplane ofA separation being indicated by the `line 3-3, Fig. 2; Fig. 4 isan enlarged sectional view of the adjusting ring for vthe clampinghooks; and Fig. 5 is a sectional view showing the universal adjustmentand clutch features in connection with a lead. dop. j

Referring tothe drawing, A designates l Specification of LettersPatent.k Application mea october s, 1914. serial No. 865,672.

` .Patented .my 2o, 1915.

the body of the dop, which ismounted for universal adjustment on a rigidstem B, the universal adjustment being provided for by a ball and socketjoint C.

The dop is made preferably, although not necessarily in' an upperdiamond -holdin `section a and a lower socket section a', an ythese twosections are separable on 'a plane transverse to the stem B, and theymay be secured together in any `suitable manner, as, for instance, byscrews 1, Fig. 2.

v The upper section4 `ai is approximately frusto-.conic'al and at itstop is provided with `a tapering socket 2 'for receiving a correspendingshapedV diamond-holding -c-up 3 which is removable so that it can beinterchangedvwith cups of' other size, according lto the dimensions ofthe diamond to bek cut.

The under'part of the section a is formed with a orizontalcircularchamberfl, and a vertical passage or slit 5' extends downwardly throughthe center of the section A .fromthe top thereof to the chamber, the

slit or space 5 servingto accommodate the clampin hooks and 6 andtheirlactuating means. hese hooks are disposed at opposite sides of the cup 3and theyymove inwardly and outwardly in a lateral direction with respectto the cup and also axially thereof. The lower ends of the clampin hooksare provided with longitudinal slots throughwhich extend pivot pins 8whereby the hooks a-reymovably retainedk `in place. Engaged withy andvdisposed between the hooks Gand 6 is a U-shaped spring 9 located withinthe passage 5, and the tension of this spring is such that -it tends toforce the diamond-engaged hooks 6 and 6 apart.

. The means for forcingthehooks laterally ltoward eachl other and intoengagement with the stone and also for `drawing, the

lhooks inwardly in an axial direction forv clamping the stone in AthecupV are the Wedges 10 and 1.0 which are employed respectively inconnection with the hooks 6 and 6. These wedges slideonsurfaces 12formedby the sides of the passage pand theyare connected with meanswithin the section a, whereby thewedges can be .forced inwardly oroutwardly. The -wedge-operating means comprisesya disk 13 which isprovided with diametrically opposlte slots 14: to receive the lower endsofthe wedges 10 and 10', and in these slots the wedges are pivotallysecured by pins 15 carried by the disk 13. The circumference of the diski is connected to the eye 20 at the central top The rear plows 25 and 26are providedv with suitable skeleton bracings 27 on their inner sidesand at their forward and rear .lower parts they have idle orcasterwheels 28 and 29 which are free to swing like the wheels 8 andy12, and consequently, these wheels 28 and 29 automatically trailaccording to the direction in which the machine is advancing or turning.An inverted U-shaped guide frame 30 rising from the chassis 1 serves asa guide for the collars 31 which slip up and Adown thereon and to whichthe front portions of the plows 25 and 26 are connected by eye-bolts 32,as shown in Figs. 7 and 10. Stout coil springs 33 connect the lowercorners of the plows 25 and 26 to brackets 34 on the chassis and thedirection of pull of these springs is such that they hold the lowerforward corners of the plows 25 and 26 in proper position. The slides 31and eye-bolts 32 provide means iwhereby the plows 25 and 26 may beraised or lowered to any desired position, and whatever position theymay assume they are adapted to be swung inwardly and outwardly inrelation to the chassis 1 and further, the rear ends of the plows 25 and26 may, by reason of thisI joint, be raised or lowered so that thegeneral forward extent of each plow may be arranged at any desiredinclination to the horizontal. Extending longitudinally of the chassis 1is a guide bar 35 which is rigidly fastened by the braces-36.Supplemental frames 37, suitably braced, are hinged lat 38 to the upperand lower portions of the respective frames 27 and the rear ends of therespective frames 37 have swiveled or eye-bolt joints 39 and a guide orrunner 40 which slides on the guide 35. The frames 37 assist insupporting the plows 25 and 26 and also constitute, with the runner 40,means whereby the two frames 27 and the respective plows 25 and 26carried thereby, may be simultaneously swung inwardly or outwardly tovary the width of the swath cleared by the plows 25 and 26. Thisadjustment is accomplished by a double cable whose upper andilowerstretches 41 and '42 run over a sheave 43, and one of these stretchesconnects to the runner 40.. The cable winds on any suitable windlass' 44located in the same general region as the windlass 24. When the windlassis operated-in one direction, the plows 25 and 26 are spread and whenoperated in the opposite direction, they are drawn toward each other.For the purpose of raising and lowering the collars 31, there areprovided independent cables 45 and 46 vwhich run over sheaves 47 and 48'on the guide frame 30 and are adapted to wind on the respectivewindlasses 49 and 50 located in the same general region as thewindlasses 24 and 44. To raise and lower the rear ends of the plows 25and 26, I provide cables 51 and 52 connected to the plows 25 and 26,which, after running over pulleys 53 Y and 54, extend to the respectivewindlasses 55 and 56 located in the same general region with thewindlasses aforesaid. Any suitable winding and llocking means may beprovided for the windlasses. The form of windlass is not important andother winding means may be provided. v1While not essential, the bracesand frame-work are pref- -erably of angle iron for purposes of lightnessand strength and the guide frames 14 and 30 are of tubing.

The front plow maybe raised and lowered and held at any desired heightand it automatically turns and responds to the direction of movement ofthe motor vehicle. Each of the rear plows can be independently raisedand located at any desired height and tilted to any desired inclination.Both of the rear plows can be simultaneously moved inwardly or outwardlyto cut a narrower or wider swath. However the plowsmay be. disposed, thesprings 33 hold the wheels 28 and 29 down to run along the surfaceoperated on so that the plows are held to their work. Inward pressure onthe plows is resisted vby the supplemental frames 37 and the meansemployed to adjust them. y

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a snow plow, the combination with a vehicle, of a front plow,guides on the vchicle, hinged guide Connections thereto from the upperportion of the plow, said plow having loose connections to lsaid guidesat points lower down whereby said plown is free to automaticallytiltatall times and when at any height and may be raised and loweredindependently of said tilting, and means for bodily raismg and loweringsaid plow independently of its adaptability to automatically tilt.

2. In a snow plow, the combination with a vehicle, of afront plow, andguiding and adjusting means adapted to permit up and down movement ofthe snow plow and tilting movement thereof comprising upright guides onthe vehicle, hinge collars on the plow which are slidable on'the guides,and forks on the plow which are slidable on the guides.

3. In a snow plow, the combination with a vehicle, of a front plow,`rguides on the vehicle, hinged guide connections thereto from the upperportion of the plow, said plow having loose connections to said guidesatpoints lower down whereby said plow is and at the sides, a rotatablering mounted in the chamber and having its erphery engageable by thethumb and ger to the open sides of the chamber, stone clamping meansextending out of the top of the chamber and movable inwardly andoutwardly for clamping and unclamping the stone, and a deviceoperatively connected with the ring and with the said means for movingthe latter by the rotation of the ring.

2.' A diamond cutters dop comprising a body, an operating ring rotatablymounted therein and conned against axial movement, said ring beinginternally threaded, a disk threaded in the ring, means for preventingthe disk from turning and permitting the disk to move axially,stone-engaging clamping hooks mounted in the body,

and means connected with the disk and op-l eratively connected with theclamping hooks for actuating the latter by the movement of thesaid ring.

3. A diamond cutters dop comprising a body, an operating ring rotatablymounted' therein and confined against axial movement, said ring beinginternally threaded, a

disk threaded in the'ring, means for preventing the disk from turningand permitting the disk to move axially, stone-engaging clamping hooksmounted in the body, wedges pivotally connected with the disk andengaging the hooks for moving the same into stone-clamping position asthe wedges move in one direction, and spring means for disengaging thehooks as the Wedges move in the opposite direction.

4. A diamond cutters dop comprising a dop body provided with a socket,the body being made in two parts screwed together and separable on aplane passing through the socket, a fixed ball disposed in the socketand on which the body is movable, a resilient lining disposed betweenthe ball and one part of the body and subjected to compressionby thescrewing of the parts of the body together, an element mounted in theball and having a spherical surface projecting outof the same, andspring means arranged in the ball and acting on the saidelement to pressthe same against the lining.

5. A dop comprising a body, a stone-receiving cup mounted therein,clamping hooks movably mounted on the body, wedging means for forcingthehooks into engagement with a stone in the cup, and means having athreaded engagement with the wedging means for operating the, same.

6. A dop comprising a body, a stonefreceiving cup mounted therein,clamping hooks movably mounted on the body, nonrotatable wedging-meanslocated within the body for forcing thehooks into engagement with astone in the cup, means located within the body for operating thewedging means, and means for moving the hooks out of en'- gagement withthe stone when the wedging means is released from the hooks.

7. A dop comprising a body, a stone holder therein, a pair of clampsdisposed at opposite sides of the holder, a rotatable element mountedwithin thebody and held against axial movement, and means actuatedtherebyl for moving the clamps into engagement with the stone.

'8. lA dop comprising a body, astoneholder therein, a pair of clampsdisposed at opposite lsides of the holder, a rotatable element in thebody, a non-rotating member having a threaded engagement with therotatable element, and means connected with the said member vfor forcingthe clamps into engagement with the stone in the holder.

9. A dop comprising a body, a stoneholder therein, a pair of clampsdisposed atzopposite sides of the holder, a rotatable element in thebody, a non-rotating member having a threaded engagement with therotatable element, wedgeshingedly connected with the said member andengaging the clamps to force the same in engagement with a stone in theholder, surfaces on which the wedges slide, and means for releasing theclamps when the action on the wedges is removed from the same. v

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

